Evelyn, there is no doubt that the issues that you face each day are ones that I cannot even begin to understand and how they impact you. I'll put myself out on a limb and say that 99.9% of the people here don't either. Understanding and caring are two completely different things though. People here care about you and want to see you succeed. We may not fully comprehend what you must deal with each day but we do care. If people didn't care, they wouldn't take the time to respond.
One thing I do understand is that cigarettes don't care about your past. They don't care one bit about your sense of loss and the other issues that you must deal with each and every day. Cigarettes only care about adding to your stress, giving you diseases, controlling your life, removing any self-esteem that you've worked so hard to get, making you feel like a failure, torture you with cravings and try to convince you that you cannot live without them. Smoking works against your therapy that will make you better.
Only you can ensure that no matter how lonely you feel that you will not smoke. We can be here to catch you when you fall and expose the junkie thinking, but at the end of the day it's just you and your will to not smoke no matter how good or bad you feel.
You were doing very good so you know you can certainly live without the damn cigarettes. Remember how good you felt as each pay passed without smoking? Then you felt lonely and smoked. Smoking didn't cause your loneliness but it did contribute to your sadness and disappointment. Smoking just adds to the very issues that you're trying to recover from.
This video is all over this site but I'm going to post here for you. I think it talks about some of the reasons why you've been finding it so hard to stay quit.
https://www.youtube.com/watch?v=qVEyGdqwjmQ